It may be necessary to contact your Danfoss supplier or
service department. Note the code number for further
troubleshooting directions.
No. Text
0 Serial port cannot be initialized. Contact your
Danfoss supplier or Danfoss Service Department.
256-258 Power EEPROM data is defective or too old.
Replace power card.
512-519 Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.
783 Parameter value outside of min/max limits
1024-1284 Internal fault. Contact your Danfoss supplier or the
Danfoss Service Department.
1299 Option SW in slot A is too old
1300 Option SW in slot B is too old
1302 Option SW in slot C1 is too old
1315 Option SW in slot A is not supported (not allowed)
1316 Option SW in slot B is not supported (not allowed)
1318 Option SW in slot C1 is not supported (not
allowed)
1379-2819 Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.
2561 Replace control card
2820 LCP stack overow
2821 Serial port overow
2822 USB port overow
3072-5122 Parameter value is outside its limits
5123 Option in slot A: Hardware incompatible with
control board hardware
5124 Option in slot B: Hardware incompatible with
control board hardware
5125 Option in slot C0: Hardware incompatible with
control board hardware
5126 Option in slot C1: Hardware incompatible with
control board hardware
5376-6231 Internal fault. Contact your Danfoss supplier or
Danfoss Service Department.
Table 7.4 Internal Fault Codes
ALARM 39, Heatsink sensor
No feedback from the heatsink temperature sensor.
The signal from the IGBT thermal sensor is not available on
the power card. The problem could be on the power card,
on the gate drive card, or the ribbon cable between the
power card and gate drive card.
WARNING 40, Overload of digital output terminal 27
Check the load connected to terminal 27 or remove short-
circuit connection. Check parameter 5-00 Digital I/O Mode
and parameter 5-01 Terminal 27 Mode.
WARNING 41, Overload of digital output terminal 29
Check the load connected to terminal 29 or remove short-
circuit connection. Check parameter 5-00 Digital I/O Mode
and parameter 5-02 Terminal 29 Mode.
WARNING 42, Overload of digital output on X30/6 or
overload of digital output on X30/7
For X30/6, check the load connected to X30/6 or remove
the short-circuit connection. Check parameter 5-32 Term
X30/6 Digi Out (MCB 101).
For X30/7, check the load connected to X30/7 or remove
the short-circuit connection. Check parameter 5-33 Term
X30/7 Digi Out (MCB 101).
ALARM 43, Ext. supply
MCB 113 Ext. Relay Option is mounted without ext. 24V
DC. Either connect an ext. 24V DC supply or specify that
no external supply is used via parameter 14-80 Option
Supplied by External 24VDC [0]. A change in
parameter 14-80 Option Supplied by External 24VDC requires
a power cycle.
ALARM 45, Earth fault 2
Ground fault on start-up.
Troubleshooting
Check for proper grounding and loose
connections.
Check for proper wire size.
Check motor cables for short-circuits or leakage
currents.
ALARM 46, Power card supply
The supply on the power card is out of range.
There are three power supplies generated by the switch
mode power supply (SMPS) on the power card: 24 V, 5 V,
±18 V. When powered with 24 V DC with the MCB 107
option, only the 24 V and 5 V supplies are monitored.
When powered with three phase AC line voltage, all three
supplies are monitored.
Troubleshooting
Check for a defective power card.
Check for a defective control card.
Check for a defective option card.
If a 24 V DC power supply is used, verify proper
supply power.
WARNING 47, 24 V supply low
The 24 V DC is measured on the control card. The external
24 V DC backup power supply may be overloaded,
otherwise contact the Danfoss supplier.
Troubleshooting Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 157
7 7
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